Floor-scraper.



A. NELSON.

FLOOR SCRAPER. APPLICATION men JAN-15.1917.

Patented M11, 1918.

2 SHEETS-SHEET 2- Y j, MJ W moofmsomimn.

Application filedJa'nuary 15, 1517. SeriaI'No. 142,418.

citizen of the United States, arid? resideiitfof" Chicago in" the county tCo'o'k and State of Illinois have invented oei ttiii flew and use? fill Improvements in Floor Sciaipe'rs, of which: the fbllbwingi i a. specification;

The common method now Messier scraping orfinishing; floors coiisists' in doing, the work b hmdscrap rs, the workine getting? down on the tfloof in order to do theisc'rap' ingj, This isa veby"slow pr qcessg beside'sbe ing, exceedingly" hard work; The presentinvention relates to a machine for" doing this WOIk, Whioh can' he op a1 WOI'kIllGII standing; in an ujgirig'ht" position,-

efiioient' Work may lie doiieg The objects of the pie'seiitl iiiveii'tiofi are to. provide animproved maeliiiie'j for ser'ap ing-i, floors; to p'rf'vlde a machine of this charaqter which mayfhe opefitted b'y; one of tvgro men; to provid" a fioo'r s'prspingfma:

chine which: will operete w'hile moving-m such an improved striiotiii'e as will be more fully. described hereifia'ft'i'f;

In the aceo'ziipariyifig; drawings illustratingjtliisfiliifentioiifg Eigure 1 is a side'v'iew';

Fig; 'is'a bottbm pl ii View" In thepar'tioiilar fame of m iii'vemion" showi'f hei'feiii' I rovide a carriage co'iiik prisinlgga fi'ain e' or-"b'odj i. portion" 5 liiountd" on axles 6 and 7p'r'ovided with Wheels 8 aiiid 9. One 01 more soi'apers-mayfhe used; but I prefer to rovide a" scraper at. each; eiid of' the carriage one of "these" scrapers b iiig'l brought'i'nto operation wh'efi the oaiii gffis movi'ng,.:inj one direotioi 'g. and the other scraper being-,pPiefaLted 'Whenthe oarii'agi ilis' scraper lOis moui itlon"effosilletifigshift 11; carried bearings 12 atone en'd f oif the flame, :and the scraper" 13-is oaifiedi. 011- an; oscillsiting shaft 14L"; ,njioilntdfijfbegiiiigsl5" at 'thefoppbsito end of -the The shafts" movedin th'e pposite directi n:

li and 14ers pvided resgectivelyiwithlup;

wardlyiextndingernis '16 and "17; Whihai'e ted by the" pivotally corineeted, at theiriipger ends to a' pipe or tube 18"; which extends lon'gitiidinally of the machine. Itwill be noted that when the tube 1 8 is moved loIigitiidinaHy, 11; will rock the shafts so as to'bli'n one or the other of the scrapers int'o" eng'algerhent with the fioof or slir'face to be acted upoii; arid I rovide means f'of corinectihg this tiibe with the'heindles, so that the p'rop'eif scraper will be broiight iht'o e ngztgeiiierit w-heii the machine is being moved in" the roper-direction for it to act; For instance; the 1eft:hand scraper; shown in Fig. 1; is the oiife'whi'ch w ill be, in opeiation vi hn' the machine is moving to the right, and the .vight-hand scraper will be {acting when the ma'bhiiie'is moving to'the' left. In orderto do this a n'd alsop rovide-two Handles, so that the machine can beope tited by two meml arrange t rotatthle' shaft" 19 at approximately'the cente'ibf theniaohiiie, this shaft having upwaltolly extending arin 20,

which asses in throiigh a slot 21- in the tube 18', and enga es ith slides or p1ungers 22 and 23' in'thetube; A coir'ipressioii sp'i'ing 24is iiise'rte'oi'betwee'n'theplunge? 221L116. an

means of a set screw 26" pas ing through the th're'adedeiid'of the tiibe 18. A corresponding-spi'iiig 27 is inserted between the pliihger 23 anden" aidjiistxbl'e abutment 28; which is ari'justed' by" mea'iisof a sorew 29 pa'ssiii'gf tnrbeghitheoppesite e'iid' mil-stubs 1s; The

shaft 19 is also "provided at either end there of" aiid Within" the side off the. fi'in'e; with thereby. pfririittiiigi the handles to be re moved oi "placed in position.

The yielding connections provided between the tongues or handles and the scrapset screws 40 and 41, which may be adjusted to limit the swinging movement of the arm 37. a

In order to lock the machine so that neither scraper is in operative position when it is being drawn by the handles, a locking" bar or lever 42 is pivoted at 43 to a lug on the frame, and is adapted to engage with a slot 44 in the outwardly extending end of the shaft 19. This handle is held in raised or locking position by means of clamping members 45, with which it engages closely when in raised position,

W1th the machlne 1n position on afioor or surface to be scraped, and the shaft 19 being 1 unlocked to permit its oscillation, one operator, for instance, pulls on the handle32, which will oscillate the shaft 19 and will swing the arm 20 to the left, thereby moving the tube 18 to the left and swinging the scraper 10 down against the surface,and this scraper will remain in operativeposition as long as the machine is being pulled by the handle 32. If the other workman simultaneously pushes on the handle 31, the action will be substantially the same. When the machine has reached the end of the surface which is being scraped, it is then moved in the opposite direction by the operator pulling on the handle 31, which in turn will swing the arm 20 to the right and bring the scraper or tool 13 into engagement with the surface. The scrapers or tools for acting on the surface may be made of any suitable material and of any form desired, but, as an illustrative example, these scraping tools may be made of sharpened steel blades, approximately six inches in length. These blades will require sharpening and adjustment, and are so arranged that this may be readily done. For instance, each blade 46 is held in a holder comprisingplates 47 and 48. The plate 47 is rigidly secured to the corresponding oscillating shaft, and has two pins 49 adjacent to the ends thereof. The

plate 48 is cut away at the corners, so as to fit in between these plns. A screw 50 passes through the plate 48 and through a slot 51 in the blade 46, and is threaded to engage with a threaded hole in the plate 47. The blade 46 may be readily removed by loosening the screw 50, and when the blade'is inserted, it may be clamped in position by spect to the floor, scrapers pivotally mounted at ea'chend of the frame, connecting means betweensaid scrapers, whereby they will be oscillated inunison to cause one or the other scraper to engage with the floor, handles at each end of the frame for drawing the same pivotally' connected with said connecting means and adaptedto swing freely up and down, the handles being attached so that when either handle is pulled, it will cause the respective scraper at the opposite end of the machine to engage the floor.

In a machine of thecharacter set forth, the combination of a movable frame, a scraper pivotally' mounted on said frame, a handle for movingsaid frame, means for mounting the handle so that it will be longitudinally movable with respect to the frame,

and resilientcormectin'g means between the handle and [scraper adapted to swing the scraper into engagement withthe surfaceto be acted upon by the'longitudinal movement ofthe handle when the handleis actuated for moving the machine.

a carriage, a scraper m'ountedat' each end of said carriage, a handle, means for connecting the handle to the carriage to ermit longitudinal movement of thehan e and connections between said scrapers and the handle, and arranged so that when one scraper is thrown into engagement with the fioor, the otherscraper will be thrown out of engagement, said scrapers being actuated by the longitudinal movement of the handle but not by its vertical movement."

4. In a machine for scraping floors, the, combination of abody, wheelsfand' axles for supporting'said body, cross shafts pivotally mounted at each end of said body,"scrapers mounted on said shafts, arms extending up wardly from said shafts, a tube 'pivotalrconnected to theupper ends of said arms, a

shaft pivotally mountedadjac'ent to the center of the body, an arm extending from said shaftjand engaging with aslot in said tube, adjustable springs between the upper end" of said armand the ends of said tube, arms 3. In ,a floor scraper, the combination of" projecting downwardly from' said lastnamed shaft, and handles connected with said last-named arms and extending outwardly at each endof the body, for operating said machine.

5. In a scraping machine, the combination of a carriage having, four wheels, a pair of scrapers pivotally mounted in said carriage, meansfor connecting said scrapers, whereby one will be thrown out of operative position when the other is thrown into operative position, a handle, a yielding adjustable connection between the handle and the scrapers, whereby the pressure of the scrapers may be regulated, and means for limiting the movement of the scrapers toward or away from the surface to be actedupon.

ALFRED NELSON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of ratents, Washington, D. (9. 

